Binding-post.



A. LNGEN.

BINDING POST.

APPLICATION FILED JAN. 16. 1909.

Patented Nov. 16, 1909.

ing-Posts, of which the following is a full,

A CORPORA- BINDING-POST.'

Specification of Letters Patent. Patented NOV. 1.6, 1909.

Application led January 16, 1.909. Serial No. 472,642.

To all whom fit may concern:

Be it known thatI, ADAM LNGEN, `a citi- -zen of theUnted States, residing at the city of New York, in the borough of Manhattan and 'State of New York, have invented certain new and useful Improvements in Bindclear, and exact description.

My invention relates to binding posts for electrical apparatus, and particularly small appliances such as telegraph and telephone instruments, electric bells, induction coils, switchboards and lamp receptacles, where a good permanent electrical connection is required, while ease of manipulation and cheapness of construction are desirable factors.

Stranded conductors are now increasingly used'for circuit wires on account of their liexibility andv other reasons, and thefbrush` ofpstrands or filaments, which is exposed to,

make an electrical connection, is not well adapted to be clamped under the head of a screw as in one common form of binding post', or fixed in a socket hole by a setscrew, as in another common construction. The former arrangement has a tendency to spread the strands out from under the screw head, as it is tightened, and the -last mentioned arrangement not only has the same general defect of diverting the strands out of the path of the screw, but also tends to cut or sever the few strands which remain in the path of the screw.

` It is the purpose of my invention to pro? vide a'binding posty which is as cheap and as easily manipulated as the present constructions lof binding post now in use, but which wholly avoids all the above mentioned difficulties. I'provide a simple permanent v electrical connection having a current carrycapacity equal to, and in many cases decidedly better than that of the remainder the circuit conductor. `With the above objects in view my invention consists in the features'of construction and combination as hereinafter set forth and claimed. f

In the drawings: Figure 1 .is a planview of a binding post embodying the principles of my invention, in use upon a supporting base; Fi 2 is a Asectional view of the same von the l1ne II-II of Fig. 1; Fig. Sis a view similar t Fig. 1 showing a slightly modified construction; Fig. 4 isl a sectional View on the line IV-IV of Fig. 3.

Referring to the drawings `in which like parts are designated by the same reference sign, 1 designates abase which may be vconsidered a wooden supporting board of any. electrical appliance, such as a telegraph rela y I 2 denotes thebody' of the binding post which comprises a U-shaped metallic part having vertically projecting arms 3 with interior. parallel flat faces 4.1

5" deslgnates an interior bottom face extending between the faces 4 and perpendicular thereto?" 6 indicates a screw which is passed `through alinedholes 7 of the arms 3, saidl holes being smooth or unthreaded, and loosely fitting enough to permit a free rotartive movement of the screw therein. The

screw is constrained against longitudinal movement in any desired way. I have illustrated a screw having a head 9. fitting closely against the outside face of one arm 3 and having a collar 10 at the other end titting against the outside face of the opposite arm 3. The collar 10V may comprise a 'simplecentrally perforated washer fitted on a reduced extremity of the screw 6, and fixedl thereon by4 riveting or p eening over the material of the screw at 12.

14 denotes a traveling nut into which the screw 6 is threaded and which comprises a 15 perpendicular to the length of the screw 6 upon which said block is threaded. 'Thetraveling nut or block 14 also has avlower flat face 16 ittingagainst the face 5 of the body. This engagement prevents the nut 14 from turning under the torsional impulse.

of the screw rotation, sothat when the latter is turned the part 14 is constrained to move longitudinally toward or from an .adJacent' -face 4 of the body, without any angulardisplacement.

|The conductor A being stripped or bared hat metallic plate -or block having side faces 1 at its end B, is inserted between the .travel- V- in-g nut 14 and an adjacent face 4 ofthe body 2. The conductor is best passed into this relation beneath the screw 6 in which case it is inclosed from all sides, as clearly shown in Fig. 2. When the screw Gis turned .by an ordinary screw drivel', the nut .14` is forcedagainst the stranded conductor and binds the same in an enga-gement between the faces 4 and 15 extending along the entire width-of the binding post. The strands of the conductor are prevented from spreading sidewise in this action by the bottom face 16 and the screw 6, but the electrical connection is substantially perfect whether some spreading takes place orvnot, lbecause any dislocation of the strands can only result in pressing them more nearly into a lat sheet engaged throughout its area by its adjacent faces l5 and 4 of the traveling nut and the body 2, respectively. It is obvious that the connection is not only very perfect electrically, but is strong and permanent mechanically considered, being unlikely to be stripped out or broken off from strains on theconductor A.

The manner of supporting the body 2 and its general outlines are of course, dependent on the particular use of the binding post and may be varied as desired. In Figs. l and 2, the body l has av depending threaded stem 25 which receives a nut 26 and washer 2T on its lower extremity,lthe binding post being clamped thereby to the base l. In Figs. 3 and l, the body 2 has laterally eX- tending ears 28 through which short bolts 29 are received to connect the binding post to a metallic base or plate 30. 3l denotesa metallic strip or plate beneath the nuts 29 of the bolts 29 in lieu of the washer 27 of the previous Coi'lstruction. lt evident that any desired electrical connection or connec tions from the binding post may be made by wires engaged beneath the nuts 26 and Q9 `of the respective forms, coperating with their associated washers or plates. TvVzere a metallic base is employed, it of course beA comes necessary to provide insulating plates i and bushings 32 to insulate the parts of the binding post from Such metallic base.

What I claim is 1. A binding post comprising a body with a pair of upwardly projecting arms, a screw journaled in both of said arms and extending therebetween, means for preventing longitudinai displacement of said screw in either direction, said arms, and a traveling nut on said screw guided by said body in a longitudinal but non-rotative movement.

A binding post comprising a body hav` ing` upwardly bent arms, a screw journaled in both of said arms and extending therebetween and having a head and a collar to prevent its longitudinal movement in either d-' rection, and a traveling nut having a lower fiat face guided against said body.

3. A binding post comprising a body. having upwardly projecting arms With flatin` side faces parallel to one another, and a flat bottom face perpendicular thereto, a screw loosely received between said arms, said screw having a head at one end and a collar at the other end 'to limit its longitudinal movement, and a traveling nut having end faces parallel to the faces of said arms, and

having a bottom'faee guided upon said remaining face of said body.

In witness whereof, I subscribe my signa ture, in the presence of two witnesses.

ADAM LUNGEN.

l'Vitnesses 1 Wanno M. A C n .A ein, .Lines DE Aivromo. 

